Amazon, lots of choices. The one I have is chargeable so no plugging it in, you just drop the small pump end down into water flexible hand held shower head. I only use it a few times a year. But if you really need a shower and you can’t get in someplace it’ll get the job done.
If you answered "no", she would walk away. If you didn't answer at all, she went around to the back, opened your trailer doors and looked at what you were carrying. I saw one once pull a folding bolt-cutter out of her purse.....